ICs for FM/AM Tuner
AN7289NSC
■ Electrical Characteristics at Ta = 25°C
1. AM mode VCC = 8.0 V, fIN = 1 MHz
AM tuning condition: OSC output frequency = 1 450 kHz ±500 Hz
Parameter
AM consumption current
AM-AF output
Symbol
amIt1
Conditions
Without input
Min
28
Typ Max
Unit
mA
mA
36
44
amVO
AM-AF output at VIN2 = 74 dBµ,
100
125
155
400 Hz 30%
AM signal-to-noise ratio
AM-AGC width
amSN
amW
AM-AF output S/N at VIN2 = 74 dBµ, 48
400 Hz 30%
52
59
58
63
dB
dB
dB
AM-AF output when input changes
55
−10 dB at VIN2 = 74 dBµ, 400 Hz 30%
AM-ATC operation
amATC (Output ratio [dB] of 400 Hz and
3 kHz when VIN2 = 18 dBµ) − (Output
ratio [dB] of 400 Hz and 3 kHz when
3.5
6.5
9.5
VIN2 = 74 dBµ) 80% Mod., AM-AF Out
output
AM-distortion 1
amT1
amT2
amVW
VIN2 = 74 dBµ 400 Hz 80%
AM-AF output distortion
0.01
0.01
97
0.5
0.5
1.5
1.5
%
%
AM-distortion 2
VIN2 = 130 dBµ 400 Hz 80%
AM-AF output distortion
AM wide band AGC on input
fIN2 = 1.4 MHz Input when pin 15
103
109
dBµ
voltage becomes below 3 V
AM local oscillation buffer output amVOS Without input
160
150
210
210
260
270
10
mV
mV
mV
V
AM-IF count output 1
AM-IF count output 2
AM-SD output 1
amIF1
amIF2
VIN2 = 40 dBµ
Without input
amSD1 VIN2 = 40 dBµ
4.5
0.0
1
4.9
0.2
50
5.1
0.5
200
1.2
5.1
36
AM-SD output 2
amSD2 Without input
V
AM signal meter output 1
AM signal meter output 2
AM signal meter output 3
AM search sensitivity DX
amVS1 Without input, pin 9 voltage
amVS2 Pin 9 voltage at VIN2 = 30 dBµ
amVS3 Pin 9 voltage at VIN2 = 130 dBµ
mV
V
0.7
4.1
24
0.95
4.8
30
V
amDX AM-IF count output is 120 mV or over
dBµ
VIN2 when f becomes 450 kHz ±2 kHz
AM search sensitivity LO
amLO
AM-IF count output is 120 mV or over
44
50
56
dBµ
VIN2 when f becomes 450 kHz ±2 kHz
3
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